Continuous phase transition in a spin-glass model without time-reversal symmetry

TL;DR

This paper studies a disordered three-spin interaction model without time-reversal symmetry, revealing a continuous phase transition at finite temperature with unique critical properties, differing from mean-field predictions.

Contribution

It demonstrates a finite temperature continuous phase transition in a short-range spin-glass model lacking time-reversal symmetry, contrasting mean-field and short-range behaviors.

Findings

Finite temperature continuous phase transition observed

Divergent spin-glass susceptibility at transition

Negative specific heat exponent identified

Abstract

We investigate the phase transition in a strongly disordered short-range three-spin interaction model characterized by the absence of time reversal symmetry in the Hamiltonian. In the mean-field limit the model is well described by the Adam-Gibbs-DiMarzio scenario for the glass transition; however in the short-range case this picture turns out to be modified. The model presents a finite temperature continuous phase transition characterized by a divergent spin-glass susceptibility and a negative specific heat exponent. We expect the nature of the transition in this 3-spin model to be the same as the transition in the Edwards-Anderson model in a magnetic field, with the advantage that the strong crossover effects present in the latter case are absent.